“I never thought it was right to call up a man and try him because he erred in doctrine, it looks too much like methodism and not like Latter day Saintism. Methodists have creeds which a man must believe or be kicked out of their church. I want the liberty of believing as I please, it feels so good not to be tramelled. ”

Joseph Smith
Discourse to Saints, April 1843; DHC 5:340.

Found in:
Words of Joseph Smith, p. 183-184 
Partially quoted in Rough Stone Rolling
Partially quoted here: http://www.lds.org/ldsorg/v/index.jsp?vgnextoid=2354fccf2b7db010VgnVCM1000004d82620aRCRD&locale=0&sourceId=f56ad2b9ae76b010VgnVCM1000004d82620a____&hideNav=1